NL28895C - - Google Patents
Info
- Publication number
- NL28895C NL28895C NL28895DA NL28895C NL 28895 C NL28895 C NL 28895C NL 28895D A NL28895D A NL 28895DA NL 28895 C NL28895 C NL 28895C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE658865X | 1927-08-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL28895C true NL28895C (en:Method) |
Family
ID=6582580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL28895D NL28895C (en:Method) | 1927-08-13 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR658865A (en:Method) |
| NL (1) | NL28895C (en:Method) |
-
0
- NL NL28895D patent/NL28895C/xx active
-
1928
- 1928-08-10 FR FR658865D patent/FR658865A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR658865A (fr) | 1929-06-21 |